Aircon cool-hot.. what's wrong? Options

[Blackyv]

just ask for my bil... he is driving a wish... recently, theaircon is not functioning normally... when driving or car moving,,... aircon is cool.. normal... but when stationary, the aircon suddenly will become not coold and blow hot air sometimes....... what's wrong??...

he asked a ws and that mechanics said dont know where blocked and need to strip open everything to check and that cost $700-$800 bucks.... i suspect that's bs ..if chocked, it will not be cool, right?.. and not intermittent...

anyone has such similar problem before??...

[Sorrow]

just ask for my bil... he is driving a wish... recently, theaircon is not functioning normally... when driving or car moving,,... aircon is cool.. normal... but when stationary, the aircon suddenly will become not coold and blow hot air sometimes....... what's wrong??...

he asked a ws and that mechanics said dont know where blocked and need to strip open everything to check and that cost $700-$800 bucks.... i suspect that's bs ..if chocked, it will not be cool, right?.. and not intermittent...

anyone has such similar problem before??...

I'm having a similar prob ..but mine is a coe car....my mech told me compressor leaking... .anyways....why dun u try going the a/c workshops as suggested in the forums...

i think ur symptoms would aso include if raining, even stationary , the aircon will be cold right...except during hot weather or noon.

[Contax]

check aircon fan or fan switch .
check gas level
check for leak

no need to dismantle everything .

Do a Search and there is several good automobile aircon wksp around.

[Chiangauto]

as from your description,it seem to be compressor issue or compressor valve issue.i would suggest you send to air con specialist. for Wish compressor is about 700 to 800 bucks.but for only valve change,it could be 250plus bucks.Any WS should know the issue as it is common issue.

[Yuan]

as from your description,it seem to be compressor issue or compressor valve issue.i would suggest you send to air con specialist. for Wish compressor is about 700 to 800 bucks.but for only valve change,it could be 250plus bucks.Any WS should know the issue as it is common issue.

Could it be an aircon filter issue?

I realise that aircon filter is something which a lot of people fails to change or maintain it.

[Bavarian]

just ask for my bil... he is driving a wish... recently, theaircon is not functioning normally... when driving or car moving,,... aircon is cool.. normal... but when stationary, the aircon suddenly will become not coold and blow hot air sometimes....... what's wrong??...

he asked a ws and that mechanics said dont know where blocked and need to strip open everything to check and that cost $700-$800 bucks.... i suspect that's bs ..if chocked, it will not be cool, right?.. and not intermittent...

anyone has such similar problem before??...

Its normal I think... When I open window, car not moving also not cold. Must move then got cold. Has been like dat for the last 30 years.

[Mustank]

Bro,

i suspect is aircon fan (in front of aircon radiator) spolit.

to check if this is so, you just open up the bonnet. engine must be switched on. aircon also switch on

see whether the fan is moving. if fan is not moving, using a mallet or the handle bar of a screw driver to gentlty wack the motor portion of the fan. do not hit the blade of the fan

if the fan motor is spoilt, generally by wacking the motor a bit, the motor will move again

but not for long. you need to change the motor asap. for the musso aircon fan motor, is $70. ownself change is $22 + time

[Accord]

For your case, 80% likely to be faulty fan motor of the condenser:)

[Blackyv]

thxs for all those valuable info...

[Zyrofillica]

might wanna check ur aircon clutch. Same problem for me, car moving no problem very very cold aircon. Once stuck in jam or idling for too long, aircon stops working and blows hot air. If parked for short while and come back while engine is still warm/hot, aircon does not work. only if car left overnight or long time and engine has cooled, aircon works on startup. Mech diagnosed aircon clutch overheating. reconditioned unit is around 300+ for my model. looks like 5th year of car ownership all the problem really start lol~

[Yattokame]

Mine was a simple case of weak battery
when driving, aircon cold. Else, it's hot.

[Zeee]

what about this: normal city & expressway driving in singapore, air cond is cool. however, at extended period of time travelling on m'sia north-south highway at a constant 150 kph, air cond blows hot air..., but when slowed down to 80-90 kph, it blows cool air. could it be air cond thermostat issue, or something else?

[Mustank]

yours sound like some aircon man exam question

anyhow piang answer:

compressor should be working since city and sg higyway driving got cold air
fan should be working if stationary got cold air
belt running the compressor should be ok because city and sg higyway driving got cold air and stationary got cold air

guess:

maybe conti car, got heater one. car going at 150 kph, maybe radiator water too hot liao. all the heat transferred to the heater. need to re-route radiator water to bypass heater.

maybe aircon pipe got no heat shield.

[Contax]

the last time I drove to penang , 4 hours into the journey , the aircon start to emit hot air and 'spitting' water out from the vent.

Realise after a while that I have read somewhere that this is call "aircon freeze" , switch off the aircon and continue driving and everything back to normal after an hour when I switch it back on.

[York]

could be ur air cond compressor clutch assembly magnet boh lart liao...modern aircon tech will tell u to change the compressor.....if u can meet an old bird aircon mech...he will knock the front metal plate to force the pulley nearer for better contact it 'cluck' again when engine idling.... will last for a couple of months more.

[Tohto]

what about this: normal city & expressway driving in singapore, air cond is cool. however, at extended period of time travelling on m'sia north-south highway at a constant 150 kph, air cond blows hot air..., but when slowed down to 80-90 kph, it blows cool air. could it be air cond thermostat issue, or something else?

My previous ride had this problem also. Switch off aircon driving for 10mins and aircon back to normal. But it will become hot again after another hour of high speed driving. At rest area, open the bonnet and check and saw the aircon piping with froze..
Send to ComfortDegro and they can't find the cause.

This post has been edited by Tohto: Apr 14 2010, 06:07 PM

[Yoongf]

Used to have the same symptom. Is faulty aircon fan at the condenser.

[Blackyv]

ok, bil checked the aircon fan... with engine running, aircon running, the fan is moving.. so, can i say aircon fan faulty is out?... next nearest possibility is fault compressor clutch?..uumm....

[Yuan]

ok, bil checked the aircon fan... with engine running, aircon running, the fan is moving.. so, can i say aircon fan faulty is out?... next nearest possibility is fault compressor clutch?..uumm....

Go to aircon specialized workshops like Mark Cool to get it diagnosed.....

[Fcw75]

Yep, Markcool or Tomika is your BIL best bet. No point guessing here and there.

East or West, go Tomika.

North, go Markcool.